Sorry if this is under the wrong section, but I specifically write fantasy and feel that this question would vary from genre to genre.

I'm starting my second draft and am realizing that it's probably taking too long for the main plot to kick in. I keep hearing that you need the "hook" almost immediately. It's one of those stories where the main character's goal is to save her friend (or at least, that's how it starts). Given that the two main characters are apart the entire novel, I feel like I need to put at least a couple of scenes of them together, otherwise the reader won't have much investment in the MC's goal or their relationship.

For SFF writers, do you start with a bang and do the worldbuilding after? How much introduction do you think is acceptable before you get bored?